This is a creative challenge taking place irregularly. In 2019 it's February 11th to 17th
What's the challenge? Draw or write about original characters (fandom-based or completely original) kissing.
Where and how to take part? Post anywhere, using the tag “ockiss19”
This is an annual creative challenge to write 31 plays (of at least 1 page each) in the month of August.
Official website: 31plays31days.com
This is an annual writing challenge running from May 1st to 31st (and sometimes September 1st to 30th)
What's the challenge? Write a finished story every day.
Official website: storyaday.org (warning: expect "sign up to my mailinglist" popups)
This is a creative challenge taking place anually on the first February
What's the challenge? Draw a comic about each hour that you are awake
Where and how to take part: Post anywhere, using the tag “hourly comic day”(?)
More info: More info: Tumblr posts tagged “hourly comic day”, Hourly comic day on Know your meme
This is an annual writing-related challenge running from March 1st to 31st
What's the challenge? Spend a total of 50 hours editing a novel (such as last November’s NaNoWriMo manuscript)
Where/How to take part: Sign up on official page www.nanoedmo.com and track time spent editing there
This is a writing challenge running annually in April and July.
What's the challenge? Set yourself a wordcount goal and meet it.
Where, how to take part: Sign up on the official website, campnanowrimo.org
When? June 1st to June 30th
What? Create details of a world you are creating. Writing or art are welcome; there is a prompts list.
Where, how to take part: worldbuildingjune.tumblr.com
This is creative challenge running annually from September 1st to 30th
What's the challenge? Work on drawing or describing settings/locations.
Where/How to take part: Post anywhere, using the tag “settingtember”
This is a creative challenge repeating annualls on the first weekend of October
What's the challenge? Create a 24 pages comic in 24 hours.
Where, how to take part:
This is a writing challenge running each month.
What's the challenge? Write at least 500 words each day.
Where, how to take part: Post on Twitter with the monthly changing tag, and insert your progress in a communal spreadsheet. More info at writingchallenge.org